<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .box>span{
            color:skyblue;
        }
        .box span{
            font-size:50px;
        }
    </style>
</head>
<body>
    <div class="box">
        <div>我就是<span><span>我是孙子的儿子</span>我是box的孙子</span></div>
        <span>我是box的儿子</span>
    </div>
</body>
</html>